Industrial Emission Treatment Technologies

K-Doped Co–Mn–Al Mixed Oxide Catalyst for N2O Abatement from Nitric Acid Plant Waste Gases: Pilot Plant Studies

“…Implementation of this technology to the given nitric acid plant would lead to the green gas emissions saving of 98 t year –1 of CO 2 equivalent. However, it is very difficult to compare the obtained results with other commercial technologies, since there are only limited amounts of results of pilot or full scale plant tests presented in the scientific literature. ,− To the best of our knowledge, the only results that can be used for comparison are those from the group of Inger, where 70% N 2 O conversion was achieved in pilot plant operations over multicomponent cobalt spinel catalyst at 400 °C, GHSV ≈ 6000 m 3 m bed –3 h –1 and p > 5 bar, since the mostly published process for tertiary N 2 O abatement is the EnviNO X -N 2 O, whose difference is in the need of reducing agent unlike our study.…”

“…Only a small number of catalysts for low temperature deN 2 O application have already been commercialized, and also only few studies devoted to the catalysts tested in pilot plants were reported. − The resistance against water and oxygen inhibition, high performance in the presence of NO x (NO + NO 2 ), and long-term stability in wet acidic environment are crucial requirements for this catalyst. Nowadays, the most known available tertiary abatement technology is the EnviNO X -N 2 O manufactured by Süd Chemie and C-NAT catalyst prepared by CRI, both also encompassed in CDM projects .…”

“…Nowadays, the most known available tertiary abatement technology is the EnviNO X -N 2 O manufactured by Süd Chemie and C-NAT catalyst prepared by CRI, both also encompassed in CDM projects . However, the offer of commercial catalysts suitable for low temperature N 2 O decomposition available at the market is still very limited …”

“…5 However, the offer of commercial catalysts suitable for low temperature N 2 O decomposition available at the market is still very limited. 3 Our recent research activities have been focused on development of a catalyst for the low temperature N 2 O decomposition, covering the catalysts development and preparation, their laboratory and pilot plant-scale testing including the long-term activity tests and assessment of usage of such a catalyst in the full scale plant based on the mathematical model of pilot plant reactor. (1)…”